fors_sumflux7

Usage

Overview

This recipe is used to monitor any lamp flux on the CCD. The input raw image should be either a FLUX_ARC_LSS or a FLUX_FLAT_LSS frame. After the background subtraction the total signal is integrated and divided by the exposure time and by the total number of CCD original pixels (keeping into account a possible rebinned readout). In the case of FORS2 frames the background is the median level evaluated from the available overscan regions. In the case of FORS1 data, where overscan regions are missing, the background is evaluated as the median level of the first 200 CCD columns for flat field data, while for arc lamp data a background map evaluated from the regions without spectral lines is computed and subtracted. The background subtracted frame is written to output in all cases, and the QC parameters QC LAMP FLUX and QC LAMP FLUXERR are computed.

Input files:

DO category: Type: Explanation: Required:
FLUX_FLAT_LSS Raw Flat field exposure Y
or FLUX_ARC_LSS Raw Arc lamp exposure Y

Output files:

DO category: Data type: Explanation:
FLUX_LAMP_LSS FITS image Background subtracted integration region

Options

--xlow <int>

X coordinate of lower left corner of integration region (pixel) (int; default: 0). The full name of this option for the EsoRex configuration file is fors.fors_sumflux.xlow [default = 0].

--ylow <int>

Y coordinate of lower left corner of integration region (pixel) (int; default: 0). The full name of this option for the EsoRex configuration file is fors.fors_sumflux.ylow [default = 0].

--xhigh <int>

X coordinate of upper right corner of integration region (pixel) (0 = CCD size) (int; default: 0). The full name of this option for the EsoRex configuration file is fors.fors_sumflux.xhigh [default = 0].

--yhigh <int>

Y coordinate of upper right corner of integration region (pixel) (0 = CCD size) (int; default: 0). The full name of this option for the EsoRex configuration file is fors.fors_sumflux.yhigh [default = 0].

Note that it is possible to create a configuration file containing these options, along with suitable default values. Please refer to the details provided by the 'esorex --help' command.

Version

fors_sumflux 5.5.6